Wiktionary
n. The symptoms that can be caused by unexpected loud sounds (acoustic incident) received on a telephone headset.
Wikipedia
Acoustic shock is the symptoms a person may experience after hearing an unexpected, loud sound. The loud sound, called an Acoustic Incident, can be caused by feedback oscillation, fax tones, or signalling tones. Telemarketers and call centre employees are thought to be most at risk.
Usage examples of "acoustic shock".
An amplified piperor, worse, a mass of amplified piperscould send the average rioter into acoustic shock.
The acoustic shock wave rang through the entire station as if a god had smashed it with a cosmic sledgehammer.
The rapidly growing fiery nucleus pushed at the torrid air, producing a spherical acoustic shock-front which began to travel faster than its creator, masking the fireball's full fury.